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Table 4 Subgroup analysis of multivariate analysis on exploring associated factors of delivery mode

From: The associated factors of cesarean section during COVID-19 pandemic: a cross-sectional study in nine cities of China

Variables

Model 1

Model 2

Model 3

Number of cases

637

643

543

Age (years)

 ≤ 30

Ref

Ref

Ref

 > 30

1.67 (1.17, 2.38)

1.83 (1.29, 2.61)

1.83 (1.24, 2.70)

Pre-gestational BMI (kg/m2)

1.16 (1.09, 1.23)

1.17 (1.10, 1.24)

1.16 (1.09, 1.24)

Number of COVID-19 cases in resident region

 ≤ 500

Ref

Ref

Ref

 > 500

2.48 (1.75, 3.53)

2.54 (1.79, 3.63)

2.72 (1.85, 4.03)

History of metabolic disease

 No

Ref

Ref

Ref

 Yes

1.31 (0.86, 2.01)

1.31 (0.85, 2.01)

-

Getting nutrition instruction

 No

Ref

Ref

Ref

 Yes

1.22 (0.84, 1.77)

1.36 (0.93, 2.00)

1.13 (0.75, 1.70)

Gestational weight gain

 Optimal

Ref

Ref

Ref

 Low

1.23 (0.79, 1.92)

1.27 (0.81, 1.97)

1.01 (0.61, 1.64)

 Excess

1.74 (1.17, 2.59)

1.79 (1.20, 2.68)

1.70 (1.10, 2.64)

  1. Multivariate logistic regression models were conducted to estimate odds ratios
  2. Model 1: Participants with preterm (N = 38) or post-term (N = 3) birth were excluded
  3. Model 2: Participants with fetal macrosomia (N = 34) or whose infant’s birth weight was missing (N = 1) were excluded
  4. Model 3: Participants with metabolic diseases were excluded (N = 135)
  5. BMI body mass index, COVID-19 2019 novel coronavirus, OR odds ratio, Ref reference